2002 Tahoe factory stereo

[Italianstln323]

Does anybody know how/where I can get a wiring diagram for a 2002 Tahoe factory radio deck, or if anybody has had any experience with this particular car. I'm trying to hook up an amplifier and a pair of subs, but the radio only has speaker level outputs, and I can't figure out which wire is the 'blue turn-on wire' for the amp because there are two blue wires.
p.s.- the only hook-ups on the back of the stereo are an 18 pin, and a 21 pin connector.
p.p.s.- i know getting a new deck would be quite a bit easier, but i want to stick with the factory deck.

[Dakota_chevy]

I'm not sure if its what you're looking for but crutchfield sells wiring diagrams for vehicles, and you get it free with the purchase of a reciever or speakers.

[exalted512]

The ignition wire should be dark green (and not the one next to a light green wire), thats what youll hook your remote up to.
-Cody

[Italianstln323]

ok thanks, and how/what ports would i hook up the subwoofers to with speaker-level output to amp?

[Italianstln323]

also, would it be ok to just splice into the existing rear speaker outs at the deck?